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Bubbles in US Regional House Prices: Evidence from House Price/Income Ratios at the State Level

Yang Hu and Les Oxley ()
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Yang Hu: University of Waikato

Working Papers in Economics from University of Waikato

Abstract: We investigate the presence of bubbles in the US house price-income ratio at the state level by applying the right-tailed unit root test of Phillips, Shi and Yu (2015, PSY) to data from January 1975 to December 2014. Based on a model specification with an intercept, we can identify ‘collapse’ episodes, ‘collapse and recovery’ episodes in addition to bubbles. The absence of an intercept in the null leads to identification of only potential bubbles. We find evidence of bubbles in several states in the 1980s (such as California, Hawaii, Massachusetts and New York), which coincides with some existing studies that investigate housing bubbles or booms and busts using a range of alternative approaches. Our results show the existence of a housing bubble that originates in the early 2000s and collapses in the mid-2000s in more than 20 States and the DC. We conclude that this housing bubble was localized and not a national phenomenon and that the bubbles of the 2000s were more widespread than the 1980s. We also found that the exclusion of an intercept in the unit root null hypothesis will affect the asymptotic theory and date-stamping outcomes for the PSY approach which translates empirically to evidence of ‘no exuberance’ in several of the states' house prices which otherwise would have suggested bubbles.

Keywords: bubbles; generalized sup ADF test; US regional house prices; house price-income ratio (search for similar items in EconPapers)
JEL-codes: C59 R19 R39 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-rmg and nep-ure
Date: 2016-05-24
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